RegularExpressionValidator

RegularExpressionValidatordisposable

System.Web.UI.WebControls (system.web.dll)class

The RegularExpressionValidator is a type of validation control that compares an input control against a pattern specified in the ValidationExpression. Regular expression validation is ideally suited for verifying predictable sequences of characters, such as those in social security numbers, email addresses, telephone numbers, and postal codes. Validation will succeed if the input control is empty, unless you also use a RequiredFieldValidator control.

Validation is always performed on the server. If the client browser supports JavaScript, validation will be performed there as well, which can save a roundtrip if errors are present. The regular expression validation performed by the JavaScript code is a subset of the full System.Text.RegularExpressions.Regex syntax. Support for it is client-dependent, and the RegularExpressionValidator will not attempt to perform client-side regular expression validation on any browser other than Internet Explorer.

public class RegularExpressionValidator : BaseValidator { // Public Constructors    public RegularExpressionValidator( ); // Public Instance Properties    public string ValidationExpression{set; get; } // Protected Instance Methods    protected override void AddAttributesToRender(System.Web.UI.HtmlTextWriter writer);// overrides BaseValidator    protected override bool EvaluateIsValid( );                    // overrides BaseValidator }

Hierarchy

System.Object System.Web.UI.Control(System.ComponentModel.IComponent, System.IDisposable, System.Web.UI.IParserAccessor, System.Web.UI.IDataBindingsAccessor) WebControl(System.Web.UI.IAttributeAccessor) Label BaseValidator(System.Web.UI.IValidator) RegularExpressionValidator



ASP. NET in a Nutshell
ASP.NET in a Nutshell, Second Edition
ISBN: 0596005202
EAN: 2147483647
Year: 2003
Pages: 873

flylib.com © 2008-2017.
If you may any questions please contact us: flylib@qtcs.net